3D printing metamaterial structures have attracted extensive attentions, due to their multifunctional, programmable and tailorable mechanical behaviors. Currently, the buckling behaviors of irregular and non-uniform metamaterial structures have become a prominent challenge due to their unstable deformations. In this study, we designed a 3D printed metamaterial structure with tailorable buckling behaviors by means of viscoelastic materials and holey column structure. Effects of pore shapes, porosity, rotation angles, and temperature on the buckling modes and mechanical properties of metamaterial structures have been investigated using finite element analysis and experimental tests. Furthermore, the constitutive relationships among critical buckling stress, strain, pore shape, porosity and rotation angle have been formulated to explore the design principle of local instability in holey-column metamaterial structure towards tailorable buckling modes.

3D打印超材料结构因其多功能、可编程和可定制的机械行为而引起了广泛的关注。目前，不规则和非均匀超材料结构的屈曲行为由于其不稳定的变形而成为一个突出的挑战。在这项研究中，我们通过粘弹性材料和多孔柱结构设计了一种具有可定制屈曲行为的 3D 打印超材料结构。利用有限元分析和实验测试研究了孔隙形状、孔隙率、旋转角度和温度对超材料结构的屈曲模式和力学性能的影响。此外，临界屈曲应力、应变、孔隙形状、